Question

Q.14
Four elements A (with one valence electron), B (with
three valence electrons), C (with five valence
electrons) and D (with seven valence electrons) are
lying in the second period in periodic table which of
the following is/are diatomic at room temperature :
(1) Only CZ
(2) Only A
(3) C, and D2
(4) Only B2​

Answer 1

Answer

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